NCT07750873 · Cardurion Pharmaceuticals, Inc.
A Trial of CRD-4730 in HFrEF
(CALIBRATE-HF)
What this study is about
CRD-4730 is a calcium/calmodulin-dependent protein kinase II (CaMKII) inhibitor. The CALIBRATE-HF trial is a Phase 2, global, multi-center, randomly assigned, where neither patients nor doctors know which treatment is given, parallel-group, compared against an inactive treatment trial.
View original scientific description
CRD-4730 is a calcium/calmodulin-dependent protein kinase II (CaMKII) inhibitor. The CALIBRATE-HF trial is a Phase 2, global, multi-center, randomized, double-blind, parallel-group, placebo-controlled trial. The trial will evaluate the efficacy, safety, and tolerability of CRD-4730 in addition to guideline directed medical therapy in participants with heart failure with reduced ejection fraction (HFrEF). Participants will be randomized to 1 of 4 study groups and receive investigational study drug or placebo twice daily (BID) for 24 weeks of treatment.
Interventions
DRUG
CRD-4730
Experimental, Dose A, B and C
DRUG
Placebo
Placebo
Primary outcome measures
Change from Baseline in Composite Z-Score at 24 weeks
Time frame: Baseline and Week 24
Composite Z-score calculated as the average of Z-scores for the change from baseline at 24 weeks for the following 6 endpoints: NT-proBNP (log-transformed), Left ventricular end-diastolic volume index (LVEDVI), Left ventricular end-systolic volume index (LVESVI), E/e' ratio, Global longitudinal strain (GLS), Left atrial volume index (LAVI). A z-score for each component endpoint is a standardized measure with a common scale with a mean of 0 and a standard deviation of 1. Composite z-score integrates the component z-scores to assess a participant's overall response. Lower composite z-scores indicate more favorable changes from baseline, whereas higher composite z-scores indicate less favorable changes from baseline.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Adult male or female patient ≥ 18 years of age and ≤ 85 years of age at the time of screening.
- Has a medical history supporting a diagnosis of clinical chronic heart failure (HF) syndrome with a duration of at least 8 weeks prior to the time of screening and current NYHA functional class II to III (based on investigator's assessment).
- Has left ventricular ejection fraction ≤ 40% by a centrally read transthoracic echocardiogram performed during screening.
- Has NT-proBNP level ≥ 600 pg/mL (70.8 pmol/L) at the time of screening. Patients in atrial fibrillation or flutter at the time of screening are required to have an NT-proBNP level of ≥ 900 pg/mL (106.4 pmol/L).
- Is receiving optimized and stable guideline directed HF therapy (per applicable regional or national guidelines).
Exclusion criteria
- Has evidence of recent HF exacerbation defined by hospitalization or requirement for IV or SQ diuretics within 4 weeks of the time of screening or during the Screening Period.
- Has a requirement for routine, scheduled outpatient IV infusions for HF (ie, inotropes, vasodilators, or diuretics) or routinely scheduled ultrafiltration.
- Has acute coronary syndrome, unstable angina, persistent angina at rest, stroke, transient ischemic attack, cardiac, carotid or other major cardiovascular surgery, cardiac valve repair (surgical or nonsurgical) or surgical replacement, or carotid angioplasty within 8 weeks prior to screening or during the Screening Period.
- Has clinical suspicion of infiltrative cardiomyopathy (eg, amyloid, sarcoid), hypertrophic cardiomyopathy (obstructive or non-obstructive), or HF secondary to severe valvular disease, active myocarditis, active pericarditis, or clinically significant congenital heart disease. NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.
Where
- Pasadena, California
- Bloomfield Hills, Michigan
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Aug 6, 2026 · Source of record for eligibility and locations